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(No Model.)

A. W. BRIGHTWELL.

ROOFING GAGE. No. 320,428. Patented June 16, 1885.

I ENTOR.

" VTTORNIEYS.

N PETERS. Pbcto-liuwgraphor, Wzuhingbn. D. C.

UNITED STATES PATENT OFFICE.

AMAZON XV. BRIGHTYVELL, OF OWEN, INDIANA, ASSIGNOR OF ONE-HALF TO GEORGE F. HOWVARD, OF SAME PLACE.

ROOFING-GAGE.

SPECIFICATION forming part of Letters Patent No. 320,428, dated June 16, 1885.

Application filed March 7, 1885. (No model.)

To ctZZ whom it may concern:

Be it known that I, AMAZON W. BRIGHT- WELL, acitizen of the United States, and a resident of Owen, in the county of Clarke and State of Indiana, have invented certain new and useful Improvements in Roofing-Gages; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in [O the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, which form a part of this specification, and in which Figure 1 is a plan view of my improved roof- [5 ing-gage, and Fig. 2 is a sectional View taken on the line 00 a: in Fig. 1.

The same letters refer to the same parts in both the figures.

This invention relates to a device which I term a roofing-gage, and it has for its object to provide a try-square with a pivoted arm and graduated segment for laying off the angles at the ends of the rafters for a roof of any desired pitch, and with a scale whereby the 2 correct position of the said pivoted arm may be ascertained for a roof of any desired pitch, and the length of rafters for roofs of various pitch and buildings of various widths.

With these ends in view the invention consists in the improved construction of the said device, which will be hereinafter fully described, and particularly pointed out in the claim.

In the drawings hereto annexed, A desig- 5 nates the base, and B the blade, of an ordinary try-square. The upper side of the base has a recess, 0, in which is pivoted an arm, D, concentrically with a segmental strap, E, which is secured to the side of the base adjoining the blade B. The radial arm D has a flange, F, grasping the segmental band, and it is provided with a set-screw, G, by means of which it may be retained securely in any position to which it may be adjusted. The said arm also terminates in a handle, H, by which it may be readily manipulated. The segment is provided with a series of lines on its upper side only, or on both sides, if desired, which said lines are indicated or identified by letters of the alphabet, and which indicate the positions to which the arm D is to be set for laying off the angles at the ends of the rafters for roofs of various pitch. The blade B is pro vided with an inch measure and with two horizontal rows of figures, marked Wd. B., and 5 indicating the various widths ofbuildi ngs, such as ten feet, twelve feet, fourteen feet, and so on. Three vertical rows of characters are marked, respectively, Pitch, Set, and Set, the first of these giving the various degrees of pitchsuch as one-third, two-fifths. one-half. and so onwhile thetwo columns markedSet have letters corresponding with those upon the segmental scale, and indicating the positions to which the arm D is to be set for laying off 6 the angles at the two ends of rafters for roofs of various pitch. Upon the horizontal lines on which the various'degrees of pitch is given is also indicated, in feet and inches, thelength of rafters for buildings of various widths, these characters being, of course, placed under the proper columns.

The operation of this invention will be readily understood. Suppose it is desired to cut the rafters for a roof of one-third pitch for a 7 5 building ten feet wide. The letters given for one-third pitch are B A. Set the arm D first to letter B on the segmental scale, and scribe one end of the rafter. Next set the arm D to letter A. By again referring to the scale it will be found that the given length of rafter for a building ten feet wide and one-third pitch is six feet one inch. This distance the square is accordingly moved toward the other end of the rafter, which is scribed, after which the 8 ends may be cut off, and will be found true.

By this device absolute accuracy is attained, and special calculations are avoided.

The device is so simple that it may be used by any one without further instruction than it 0 itself imparts.

The scale upon the blade B, under the lower line \Vd. B, is for projecting rafters that project beyond the sides of the building, and is worked in precisely the same manner as that already described.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States A trysquare having a segmental strap and too a radial arm adjustable upon the latter, said segment being graduated and marked with letters, and the blade of the try-square being In testimony that I claim the foregoing as provided with a scale having three vertical my own I havehereunto uliixed my signature columns giving various pitches for roofs, and in presence of two witnesses.

letters corresponding with those upon the seg- 5 ment,in(licating the angles for the ends of raft- AMAZON \V. BRTGHTVVELL.

ers, and horizontal rows of figures indicating the width of buildings and the lengths of raft- \Vitnesses: ers, the whole arranged and adapted to oper- WILLIAM P. HUOKLEBERRY, ate substantially as and for the purpose herein J AMES K. REESE.

10 set forth. 

